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What is CBD? Your Complete Guide to Cannabidiol

Dive into our comprehensive guide on CBD (Cannabidiol) at Eir Health. Learn everything from its benefits, uses, and how it interacts with your body, to choosing the right CBD products...

CBD has been touted for its many benefits in the past few years, appearing in beauty and personal care products, on cafe menus, and on the shelves of national chain stores. In fact, it’s now more accessible than ever. The CBD market is currently valued around $590 million, and is expected to surpass $22 billion by 2020, according to research firm The Brightfield Group.

Even before CBD became a cultural buzzword, it was prized by wellness enthusiasts and health experts for its vast all-natural therapeutic properties.

But what exactly is CBD, and what does it do? Here is our definitive guide to everything you need to know about the crop that’s taking over the world.


CBD, officially known as cannabidiol, is one of the most prominent cannabinoids present in the Cannabis genus of plants. Cannabis plants have three strains—Sativa, Indica, and Ruderalis—some of which are further differentiated as marijuana or hemp. The main difference between the two is that hemp only stems from the Sativa species, while marijuana can come from either Sativa or Indica strains. Marijuana plants contain higher concentrations of tetrahydrocannabinol (THC)—the cannabinoid that produces the “stoner’s high.”

CBD is classified as hemp, meaning there’s 0.3% THC or less present in the compound. Marijuana, in contrast, can best be described as any cannabis derivative containing 0.3% THC or greater. CBD is legal as long as it is hemp-derived and falls within the limits on THC.

CBD has powerful non-psychoactive properties (meaning it doesn’t get you high) that make it ideal for medical use. However, uses range along a spectrum from health to wellness to recreation.


Since CBD is non-psychoactive, it does not greatly affect or impair mental ability throughout the day. Potential side-effects are rare, but can include mild lethargy or a suppressed appetite.

CBD can be ingested via capsules or tinctures, vaporized, or used topically. The most potent way to take CBD is to ingest it—but vaporizing may be felt more quickly. A 2018 study that surveyed CBD users across the United States found that a majority of users prefer to take cannabidiol sublingually, or orally.

The same study found that almost 62% of those surveyed use CBD for medical reasons.

CBD isn’t a cure-all, but its ability to ease certain symptoms of several physical and mental illnesses are felt by those who use it. Among the more common uses for CBD are to help treat anxiety, cancer, seizures, PMS, stress, migraines, and depression—to name a few. Additionally, CBD is often considered a sleep aid since it helps ease some of these conditions that commonly interfere with sleep patterns.

While medical cannabidiol research is still in the early stages, there are numerous testimonials from health and wellness practitioners, as well as individuals and patients, that are decidedly pro-CBD.

To determine which dose and product is right for your needs, always consult a medical professional before trying a new supplement.


The individual components of the cannabis plant, including THC and CBD, were discovered and studied over the early to mid-1900s, but it wasn’t until the 1990s that scientists truly connected the dots on how cannabinoids interact with the body.

The discovery of anandamide, a neurotransmitter and endogenous cannabinoid with a structure similar to THC, was a turning point for scientists. In 1992, Dr. Raphael Mechoulam, one of the scientists responsible for much of the 20th century cannabis research, discovered that anandamide was part of a larger system in the body. Known as the endocannabinoid system, this network consists of powerful endocannabinoid receptors that bind with cannabinoids and allow the compounds to enter into the bloodstream.

Since then, knowledge of the endocannabinoid system, how cannabinoids affect the body, and the impact CBD can have on illnesses has grown at an exponential rate.

A 2006 study published in the The American Society for Pharmacology and Experimental Therapeutics synthesized everything scientists knew about the endocannabinoid system since its discovery. This included key findings from neural research and significant results from clinical trials across multiple categories spanning pain and inflammation, gastrointestinal disorders, and musculoskeletal disorders.

After looking at such a large cross-section of research, scientists concluded the future of cannabinoids to be overwhelmingly positive, indicating significant therapeutic uses for CBD.


Like many other cannabinoids, CBD has great potential that can be used in a variety of areas. However, when it comes to medicinal use, CBD beats the hell out of its hemp relatives. Constantly conducted research in this matter has proved that this compound has a positive effect on reducing such conditions as:

  • Anxiety. CBD, according to many of the results of the analyses, seems to have anti-anxiety properties.
  • Inflammations. Multiple scientific reviews have noted that CBD seems to reduce inflammation in different parts of the body. It seems to block the receptors involved in the inflammation process.
  • Pain. Studies show that CBD can be used as a painkiller. Sativex, an FDA-approved, THC- and CBD-based treatment for people with multiple sclerosis, reduces pain significantly.
  • Seizure disorders. This is one of the most well-documented benefits of CBD. Recently, an FDA-approved medication called Epidiolex has appeared on the US market. This CBD-based medication is used to treat certain rare, severe seizure disorders.

In addition to the proven benefits mentioned above, limited research suggests that CBD can also treat or prevent conditions such as:

  • Acne. CBD not only reduces inflammation - including skin inflammation - but can also regulate excessive sebum production, which greatly improves skin condition.
  • Addiction. Some research suggests that CBD can be used to treat addiction, e.g. nicotine addiction.
  • Cardiovascular disease. According to some studies, cannabidiol lowers blood pressure and prevents some heart disease.
  • Depression. There is some evidence suggesting that CBD may be able to reduce depression by changing the way our bodies interact with serotonin, a mood-lifting chemical.
  • Sleep disorders. A 2019 study suggested that CBD can reduce anxiety-related insomnia. However, it doesn’t seem to make you groggy: a 2014 study suggested that CBD could actually promote wakefulness.

CBD also seems to treat some diseases in dogs, such as osteoarthritis and seizure conditions. That is why more and more pet owners use CBD for their dogs.

While some of the benefits of CBD are well-documented and proven, CBD may also have other benefits that still need confirmation by further research. Therefore, the list of potential uses of CBD to treat or prevent certain conditions is still open. This proves that cannabidiol as a medicinal substance still has a lot to offer us.


Let's look at the conditions where CBD can bring the most benefits.


This disease is one of the oldest known neurological diseases. Therefore, it would seem that all possible treatments are already known in this regard. As it turns out, CBD has huge potential here. This is confirmed by numerous clinical trials, including Lennox-Gaustaut Syndrome or Dravet Syndrome. According to their results, most of the patients felt a significant improvement while taking appropriate doses of cannabidiol.


Headaches are currently one of the most common complaints. It is estimated that migraines affect about 4-20% of all people. CBD, in turn, has been used for years as an analgesic and an anesthetic. It turns out that cannabidiol also relieves migraine headaches.


As many as 30-50% of adults report insomnia problems in various research. CBD may come to the rescue for those who have not slept in a long time. Research confirms that CBD increases sleep time and prolongs the REM phase. In turn, the calming properties of CBD relax the mind and increase melatonin secreted naturally in the body. Therefore, the improvement in the quality of sleep and life can be huge.


This unpleasant condition affects up to 20% of the population. Until now, people struggling with IBS had to somehow deal with the persistent symptoms of this disease entity. Fortunately, it has been discovered that CBD can affect the mechanisms of the digestive system. The way CBD works is often similar to that of conventional medicines commonly used - even probiotics, which is why cannabidiol has the chance to be used to soothe the symptoms of this condition as well.


Over the years, many substances have emerged that are increasingly effective in treating this unpredictable disease. Unfortunately, their use is often associated with unpleasant side effects. CBD therapy can bring a lot of good in this field. Cannabidiol has an antipsychotic effect and can be used as an adjunct therapy.


CBD has a significant impact on the pathophysiology of Parkinson's disease, so it could be used in the future as a drug in the treatment of this disease. Clinical trials show that this topic is quite serious and developmental. Its seriousness may also be demonstrated by the fact that pharmaceutical companies are interested in cannabidiol.


From a physiological point of view, the endocannabinoid system has the potential to affect pain-related processes. So all substances that affect it can modulate pain. One of these substances is cannabidiol, which is increasingly appreciated for its healing properties of this issue.


It is known that CB1 and CB2 receptors are present in the cells of our body's tissues. Their presence in cancerous tumors was also observed. It has been proven that in breast cancer, prostate cancer, hepatocellular carcinoma and melanoma, these receptors are more common than in healthy patients. Therefore, CBD may play a significant role in cancer therapy.


Unfortunately, there is currently not much known about the relationship between the endocannabinoid system and human Alzheimer's disease. However, some observations suggest that this relationship may occur and CBD may have a significant impact on the mechanism of this disease.


Anxiety disorders and depression are diseases that significantly limit the daily functioning of patients. However, the results of studies on the effectiveness of CBD in the treatment of neuroses and depression are very promising.


As it turns out, CBD can be effective in relieving the symptoms of multiple sclerosis such as sleep problems, spastic muscle tension, depression and urination problems. Therefore, the use of cannabidiol can positively affect the quality of life of people suffering from this disease.



The fact that cannabidiol is generally safe and well tolerated by humans is confirmed by many studies. Side-effects associated with CBD intake are rare and usually have a fairly mild course. We are talking primarily about nausea, diarrhea, changes in appetite or fatigue.

Studies show that CBD may interact with some medicines, so it's important to consult your doctor for the inclusion of CBD in your daily life. CBD may affect your body's ability to metabolize certain drugs.

In terms of safety, the most important thing is the choice of the highest quality products, such as CBD oils from Eir Health, which, compared to the competition, present the highest quality standards. Many brands mislead consumers by producing products with many additives and a small amount of cannabinoids.


The most popular and one of the most effective forms of taking CBD are so-called CBD oils. Next to cannabinoids, they also contain oil (e.g. MTC), which is a carrier of active substances. MCT oil is an important element of such products because, as a rule, CBD (and other cannabinoids) are fat soluble, which significantly increases their absorption.

According to the main division of CBD oils, there are two main types of CBD oils: broad-spectrum CBD oils and CBD isolates. In the case of the former, we are dealing with a full range of hemp substances, from CBG, through CBN, CBC, THC, to the main character - CBD. Isolates, as the name suggests, contain only CBD in their composition. Which option is the best for you?

It is widely believed that full spectrum oils benefit from synergies between cannabinoids, and their effects are more effective. That is why, for most people, full spectrum is number one.

However, CBD isolate is ideal for people undergoing drug testing. Since full-spectrum cannabinoid oils also contain trace amounts of THC, they can have a positive result. CBD isolate is also a much better choice when it comes to specialist patients who use pure CBD in their therapies.


In addition to traditional full- and broad-spectrum CBD oils and isolates, the market also offers products containing extra active substances and mixes of terpenes to bring a specific health-promoting effect. Thanks to properly selected ingredients, this type of products are easier to take and more effective in the case of specific conditions. One of the functional CBD oils are CBD Oil NO.9: Awake and CBD Oil NO.10: Sleep. In CBD Oil NO.9: Awake, in addition to CBD and other compounds naturally occurring in hemp, you can find a special blend of terpenes, called STV mix, responsible for reducing the drowsiness feeling which can occur during the use of traditional CBD oils. The product has also been enriched with vitamins D3 + K2 - crucial for the proper functioning of the body, especially in the autumn and winter season. On the other hand, the composition of CBD Oil NO.10: Sleep contains a mix of NDC terpenes, which, along with melatonin and lavender, positively affects problems with the quality of sleep. This revolutionary approach allows you to reap the benefits of the natural properties of medical cannabis without the intoxicating effects of THC.


Proper CBD dosage is the key to solving many health problems. That is why it is worth getting acquainted with the topic of cannabidiol dosage at the very beginning of the adventure with this substance. Factors influencing it are very important in determining the right dose of CBD. When looking for the perfect amount of CBD, it's worth considering age, weight, metabolism, diet and level of physical activity. However, the main principle is the selection of substances in milligrams, which greatly facilitates the precise intake of cannabidiol in the form of CBD oil. More on cannabidiol dosing can be found in the article: Dosage and Use of CBD.

If you're just off the boat when it comes to CBD dosage, you can trust the proven tool MyDosage. This intelligent CBD dose calculator will automatically match the right amount of CBD for you, based on your experience in CBD, ailments, weight, general well-being, etc.


Taking oils dedicated to a specific part of the day is much more intuitive than in the case of oils with a traditional composition. Thanks to the division into day and night oil, the product intake schedule has been significantly simplified. Many novice users face the problem of determining the frequency and timing of CBD intake, as traditional oils can be used in a variety of regimens depending on the ailments and needs of the user. Using CBD Oil. NO.9 Awake and CBD oil No.10: Sleep eliminates this problem, because, as the name suggests, they should be taken at a particular time of the day. This kit is therefore ideal for inexperienced users who wish to reap the maximum benefits of CBD oils with relatively little experience and knowledge.


Whether CBD is addictive or not is one of the most frequently asked questions by beginner CBD users. It is true that there is marijuana (THC) addiction. So what about CBD? As it turns out, CBD is not an addictive substance, so you can safely take it every day.

The use of CBD products is considered to be completely safe, even in large quantities. Side effects that can occur with a high dose of CBD are minimal and often do not last too long.To date, no cases of CBD overdose have been reported that could have serious health consequences. Although no serious side effects are known when taking large amounts of CBD, it is recommended that you start with low doses and gradually increase your CBD intake, thus observing your body's response to increased amounts of cannabidiol.


Despite everything that is known about CBD’s positive effects, CBD regulation across the globe is still in its infancy.

In June 2018, the U.S. Food and Drug Administration (FDA) approved the first clinical cannabidiol solution—Epidiolex, designated for treatment of severe epilepsy—for legal medical use.

Subsequently, the FDA implemented the Farm Bill at the close of 2018, removing hemp from the controlled substances list and opening up the floodgates for brands clamoring to cash in on the “green rush.”

On May 31, 2019, the FDA held a public hearing that acted as an open forum for brands, companies, and officials to discuss the way forward. The consensus was that the FDA needs to move quickly on new regulations to allow growers to thrive, to enable healthcare professionals to generate more data, and to pull back the curtain on what CBD in food really does.

In Europe, the E.U. recently defined hemp CBD products as “novel foods” in a formal statement issued by the International Cannabis and Cannabinoids Institute. This classification means that, despite burgeoning scientific research, the governing bodies don’t have enough information on CBD, and products must be weighed on a case-by-case basis before going to market.

Regulations big or small that allow the sale of safe, legal hemp products are a step toward charting a course for the future of CBD.


Ultimately, cannabis is still a nascent category. Brands and products are outgrowing regulations, so not every CBD offering is top-notch or representing itself accurately. To avoid purchasing a placebo or harmful product, be sure to double-check the label and growing information to ensure it is premium quality.

That said, CBD can be effective as an everyday supplement to your health and wellness routine. Always consult a medical professional before trying a new product to determine if it is right for you.


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